Add support for refresh token (#3366)

Signed-off-by: Paolo Di Tommaso <paolo.ditommaso@gmail.com>

modules/nf-httpfs/src/main/nextflow/file/http/XAuthProvider.groovy

@@ -32,4 +32,6 @@ interface XAuthProvider {
      */
     boolean authorize( URLConnection connection )
 
+    boolean refreshToken( URLConnection connection )
+
 }

modules/nf-httpfs/src/main/nextflow/file/http/XAuthRegistry.groovy

@@ -50,4 +50,11 @@ class XAuthRegistry {
         return false
     }
 
+    boolean refreshToken(URLConnection connection) {
+        for( XAuthProvider it : providers ) {
+            if( it.refreshToken(connection) )
+                return true
+        }
+        return false
+    }
 }

modules/nf-httpfs/src/main/nextflow/file/http/XFileSystemProvider.groovy

@@ -207,7 +207,7 @@ abstract class XFileSystemProvider extends FileSystemProvider {
     protected URLConnection toConnection(Path path) {
         final url = path.toUri().toURL()
         log.trace "File remote URL: $url"
-        toConnection0(url, 0)
+        return toConnection0(url, 0)
     }
 
     protected URLConnection toConnection0(URL url, int attempt) {
@@ -232,6 +232,11 @@ abstract class XFileSystemProvider extends FileSystemProvider {
             Thread.sleep(delay)
             return toConnection0(url, attempt+1)
         }
+        else if( conn instanceof HttpURLConnection && conn.getResponseCode()==401 && attempt==0 ) {
+            if( XAuthRegistry.instance.refreshToken(conn) ) {
+                return toConnection0(url, attempt+1)
+            }
+        }
         return conn
     }
 

plugins/nf-tower/src/main/io/seqera/tower/plugin/TowerFactory.groovy

@@ -74,19 +74,9 @@ class TowerFactory implements TraceObserverFactory {
     }
 
     protected XAuthProvider provider(String endpoint, String accessToken) {
-        assert !endpoint.endsWith('/'), "Tower endpoint URL should end with a `/` character"
-        final pattern = ~/(?i)^$endpoint\/.*$/
-        new XAuthProvider() {
-            @Override
-            boolean authorize(URLConnection conn) {
-                final req = conn.getURL().toString()
-                if( pattern.matcher(req).matches() && !conn.getRequestProperty('Authorization') ) {
-                    log.trace "Authorizing request connection to: $req"
-                    conn.setRequestProperty('Authorization', "Bearer $accessToken")
-                    return true
-                }
-                return false
-            }
-        }
+        if (endpoint.endsWith('/'))
+            throw new IllegalArgumentException("Tower endpoint URL should not end with a `/` character -- offending value: $endpoint")
+        final refreshToken = env.get('TOWER_REFRESH_TOKEN')
+        return new TowerXAuth(endpoint, accessToken, refreshToken)
     }
 }

plugins/nf-tower/src/main/io/seqera/tower/plugin/TowerXAuth.groovy

@@ -0,0 +1,122 @@
+/*
+ * Copyright 2020-2022, Seqera Labs
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package io.seqera.tower.plugin
+
+import java.net.http.HttpClient
+import java.net.http.HttpRequest
+import java.net.http.HttpResponse
+import java.time.Duration
+import java.util.regex.Pattern
+
+import groovy.transform.CompileStatic
+import groovy.util.logging.Slf4j
+import nextflow.file.http.XAuthProvider
+
+/**
+ * Implements Tower authentication strategy for resources accessed
+ * via {@link nextflow.file.http.XFileSystemProvider}
+ *
+ * @author Paolo Di Tommaso <paolo.ditommaso@gmail.com>
+ */
+@Slf4j
+@CompileStatic
+class TowerXAuth implements XAuthProvider {
+
+    final private Pattern pattern
+    final private String endpoint
+    private String accessToken
+    private String refreshToken
+    private CookieManager cookieManager
+    final private HttpClient httpClient
+
+    TowerXAuth(String endpoint, String accessToken, String refreshToken) {
+        this.endpoint = endpoint
+        this.pattern = ~/(?i)^$endpoint\/.*$/
+        this.accessToken = accessToken
+        this.refreshToken = refreshToken
+        //
+        // the cookie manager
+        cookieManager = new CookieManager()
+        // create http client
+        this.httpClient = HttpClient.newBuilder()
+                .version(HttpClient.Version.HTTP_1_1)
+                .followRedirects(HttpClient.Redirect.NORMAL)
+                .cookieHandler(cookieManager)
+                .connectTimeout(Duration.ofSeconds(10))
+                .build()
+    }
+
+    @Override
+    boolean authorize(URLConnection conn) {
+        final req = conn.getURL().toString()
+        if( pattern.matcher(req).matches() && !conn.getRequestProperty('Authorization') ) {
+            log.trace "Authorizing request connection to: $req"
+            conn.setRequestProperty('Authorization', "Bearer $accessToken")
+            return true
+        }
+        return false
+    }
+
+    boolean refreshToken(URLConnection conn) {
+        if( !refreshToken || !pattern.matcher(conn.getURL().toString()).matches() ) {
+            return false
+        }
+
+        final req = HttpRequest.newBuilder()
+                .uri(new URI("${endpoint}/oauth/access_token"))
+                .headers('Content-Type',"application/x-www-form-urlencoded")
+                .POST(HttpRequest.BodyPublishers.ofString("grant_type=refresh_token&refresh_token=${URLEncoder.encode(refreshToken, 'UTF-8')}"))
+                .build()
+
+        final resp = httpClient.send(req, HttpResponse.BodyHandlers.ofString())
+        log.debug "Refresh cookie response: [${resp.statusCode()}] ${resp.body()}"
+        if( resp.statusCode() != 200 )
+            return false
+
+        final authCookie = getCookie('JWT')
+        final refreshCookie = getCookie('JWT_REFRESH_TOKEN')
+
+        // set the new bearer token in the current client session
+        if( authCookie?.value ) {
+            log.trace "Updating http client bearer token=$authCookie.value"
+            accessToken = authCookie.value
+        }
+        else {
+            log.warn "Missing JWT cookie from refresh token response ~ $authCookie"
+        }
+
+        // set the new refresh token
+        if( refreshCookie?.value ) {
+            log.trace "Updating http client refresh token=$refreshCookie.value"
+            refreshToken = refreshCookie.value
+        }
+        else {
+            log.warn "Missing JWT_REFRESH_TOKEN cookie from refresh token response ~ $refreshCookie"
+        }
+
+        return true
+    }
+
+    private HttpCookie getCookie(final String cookieName) {
+        for( HttpCookie it : cookieManager.cookieStore.cookies ) {
+            if( it.name == cookieName )
+                return it
+        }
+        return null
+    }
+}